package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.properties.JwtProperties;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //对前端传过来的明文密码进行md5加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     */
    @Override
    public void add(EmployeeDTO employeeDTO) {
        //将DTO对象转换成entity对象
        /*DTO和entity中大多数属性都是相同的，可以使用beanUtils来处理
         * */
        /*
        * employee = Employee.builder()
                .name(employeeDTO.getName())
                .phone(employeeDTO.getPhone())
                .sex(employeeDTO.getSex())
                .idNumber(employeeDTO.getIdNumber())
                .status(1)
                .createTime(LocalDateTime.now())
                .updateTime(LocalDateTime.now())
                .createUser(1L)
                .updateUser(1L)
                .password(DigestUtils.md5DigestAsHex("1234567".getBytes()))
                .build();*/

        Employee employee = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);
        //设置创建时间和更新时间
        /*
        *employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());*/
        //
        /*
        *老方法
        * String jwt = request.getHeader(jwtProperties.getAdminTokenName());
        Claims claims = JwtUtil.parseJWT(jwtProperties.getAdminSecretKey(),jwt);
        Long empId = Long.valueOf(claims.get(JwtClaimsConstant.EMP_ID).toString());*/

        /*
         * 新方法：利用线程技术ThreadLocal*/
        /*
        *由AOP已经做出了优化
        *employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        //设置账户状态 0表示锁定 1表示正常
        employee.setStatus(StatusConstant.ENABLE);
        //设置密码，进行密码加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employeeMapper.add(employee);
    }

    /**
     * 分页查询
     *
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        //设置分页参数
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        //执行正常的查询所有数据的操作
        List<Employee> empList = employeeMapper.list(employeePageQueryDTO);
        //把list<Employee>转换成page<Employee>
        Page<Employee> pageList = (Page<Employee>) empList;
        //Page<Emp>类里面有两个方法可以得到总的记录数和分页的结果
        return new PageResult(pageList.getTotal(), pageList.getResult());

    }

    /**
     * 根据id查询员工
     *
     * @param id
     * @return
     */
    @Override
    public Employee getById(Integer id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("****");
        return employee;

    }

    /**
     * 修改员工状态
     *
     * @param id
     * @param status
     */
    @Override
    public void amendStatus(Integer id, String status) {
        /*修改时间和修改人也要修改*/
        Employee employee = getById(id);
        employee.setStatus(Integer.parseInt(status));
        employeeMapper.alterEmp(employee);
    }

    /**
     * 修改用户信息
     *
     * @param employeeDTO
     */
    @Override
    public void alterEmp(EmployeeDTO employeeDTO) {
        //将对象类型进行转换
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        employeeMapper.alterEmp(employee);
    }

    /**
     * 修改密码
     *
     * @param passwordEditDTO
     */
    @Override
    public void editPassword(PasswordEditDTO passwordEditDTO) {
        //由empId查找出所对应的员工
        Employee employee = getById(Math.toIntExact(passwordEditDTO.getEmpId()));
        //查看此员工的密码和就密码是否相同
        if (!employee.getPassword().equals(DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes()))) {
            //不相同直接结束方法
            //抛出异常
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }
        //相同则修改密码
        employee.setPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()));

        employeeMapper.alterEmp(employee);
    }

}
